Benzenesulfonic acid, 3,3'-[carbonylbis[imino(5-methoxy-2-methyl-4,1-phenylene)azo]]bis[5-amino-4-methyl-, disodium salt

Preparation

2′-Methyl-3′-ammo-5′-sulfooxanilic acid?diazo, and 2-Amino-4-methylanisole coupling, and then hydrolyzed acid base and make the grass phosgenated.

Properties and Applications

yellow light brown. Soluble in water for golden brown, easily soluble in ethanol. The strong sulfuric acid for dark purple, yellow for olive diluted. The dye solution to join strong hydrochloric acid with olives yellow to brown precipitation; Add thick sodium hydroxide solution for green light yellow until golden brown.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
AATCC	3	5	2	4		3-4